A280883 Number of set partitions of [n] into exactly five blocks where sizes of distinct blocks are coprime.

1, 15, 35, 630, 126, 6930, 9570, 202455, 35035, 3612609, 361725, 25350780, 50620220, 1262865060, 15864468, 33652405845, 942571665, 68217941715, 72924794635, 7281932609490, 364040548850, 111203641740750, 79780936522950, 2097251547484275, 471615091340211

Offset

5,2

Links

Table of n, a(n) for n=5..29.

Wikipedia, Coprime integers

Wikipedia, Partition of a set

Crossrefs

Column k=5 of A280880.

Sequence in context: A074891 A328213 A271733 * A306325 A241282 A249056

Adjacent sequences: A280880 A280881 A280882 * A280884 A280885 A280886

Keyword

nonn

Author

Alois P. Heinz, Jan 09 2017

Status

approved